forked from AuroraMiddleware/gtk
ef027c93d4
GtkScrollbar used to rely on style-updated being emitted every time
after the widget was created in order to set the right values from its
style properties on GtkRange.
Nowadays we try to be smarter and avoid emitting style-updated at
creation time, so we need to manually initialize the GtkRange values.
This fixes a regression from 35e36b9fe5.
https://bugzilla.gnome.org/show_bug.cgi?id=686280
183 lines
7.3 KiB
C
183 lines
7.3 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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* Copyright (C) 2001 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtkscrollbar.h"
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#include "gtkadjustment.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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#include "a11y/gtkscrollbaraccessible.h"
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/**
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* SECTION:gtkscrollbar
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* @Short_description: A Scrollbar
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* @Title: GtkScrollbar
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* @See_also: #GtkAdjustment, #GtkScrolledWindow
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*
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* The #GtkScrollbar widget is a horizontal or vertical scrollbar,
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* depending on the value of the #GtkOrientable:orientation property.
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*
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* The position of the thumb in a scrollbar is controlled by the scroll
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* adjustments. See #GtkAdjustment for the fields in an adjustment - for
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* #GtkScrollbar, the #GtkAdjustment:value field represents the position
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* of the scrollbar, which must be between the #GtkAdjustment:lower field
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* and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
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* #GtkAdjustment:page-size field represents the size of the visible
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* scrollable area. The #GtkAdjustment:step-increment and
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* #GtkAdjustment:page-increment fields are properties when the user asks to
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* step down (using the small stepper arrows) or page down (using for
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* example the <keycap>PageDown</keycap> key).
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*/
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static void gtk_scrollbar_style_updated (GtkWidget *widget);
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G_DEFINE_TYPE (GtkScrollbar, gtk_scrollbar, GTK_TYPE_RANGE)
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static void
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gtk_scrollbar_class_init (GtkScrollbarClass *class)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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widget_class->style_updated = gtk_scrollbar_style_updated;
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_int ("min-slider-length",
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P_("Minimum Slider Length"),
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P_("Minimum length of scrollbar slider"),
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0,
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G_MAXINT,
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21,
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GTK_PARAM_READABLE));
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_boolean ("fixed-slider-length",
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P_("Fixed slider size"),
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P_("Don't change slider size, just lock it to the minimum length"),
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FALSE,
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GTK_PARAM_READABLE));
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_boolean ("has-backward-stepper",
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P_("Backward stepper"),
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P_("Display the standard backward arrow button"),
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TRUE,
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GTK_PARAM_READABLE));
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_boolean ("has-forward-stepper",
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P_("Forward stepper"),
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P_("Display the standard forward arrow button"),
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TRUE,
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GTK_PARAM_READABLE));
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_boolean ("has-secondary-backward-stepper",
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P_("Secondary backward stepper"),
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P_("Display a second backward arrow button on the opposite end of the scrollbar"),
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FALSE,
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GTK_PARAM_READABLE));
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gtk_widget_class_install_style_property (widget_class,
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g_param_spec_boolean ("has-secondary-forward-stepper",
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P_("Secondary forward stepper"),
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P_("Display a second forward arrow button on the opposite end of the scrollbar"),
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FALSE,
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GTK_PARAM_READABLE));
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gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLBAR_ACCESSIBLE);
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}
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static void
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gtk_scrollbar_update_style (GtkScrollbar *scrollbar)
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{
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gint slider_length;
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gboolean fixed_size;
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gboolean has_a, has_b, has_c, has_d;
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GtkRange *range = GTK_RANGE (scrollbar);
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GtkWidget *widget = GTK_WIDGET (scrollbar);
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gtk_widget_style_get (widget,
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"min-slider-length", &slider_length,
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"fixed-slider-length", &fixed_size,
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"has-backward-stepper", &has_a,
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"has-secondary-forward-stepper", &has_b,
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"has-secondary-backward-stepper", &has_c,
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"has-forward-stepper", &has_d,
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NULL);
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gtk_range_set_min_slider_size (range, slider_length);
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gtk_range_set_slider_size_fixed (range, fixed_size);
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_gtk_range_set_steppers (range,
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has_a, has_b, has_c, has_d);
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}
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static void
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gtk_scrollbar_init (GtkScrollbar *scrollbar)
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{
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GtkStyleContext *context;
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context = gtk_widget_get_style_context (GTK_WIDGET (scrollbar));
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBAR);
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gtk_scrollbar_update_style (scrollbar);
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}
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static void
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gtk_scrollbar_style_updated (GtkWidget *widget)
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{
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GtkRange *range = GTK_RANGE (widget);
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gtk_scrollbar_update_style (GTK_SCROLLBAR (widget));
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GTK_WIDGET_CLASS (gtk_scrollbar_parent_class)->style_updated (widget);
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}
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/**
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* gtk_scrollbar_new:
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* @orientation: the scrollbar's orientation.
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* @adjustment: (allow-none): the #GtkAdjustment to use, or %NULL to create a new adjustment.
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*
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* Creates a new scrollbar with the given orientation.
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*
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* Return value: the new #GtkScrollbar.
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*
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* Since: 3.0
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**/
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GtkWidget *
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gtk_scrollbar_new (GtkOrientation orientation,
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GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
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NULL);
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return g_object_new (GTK_TYPE_SCROLLBAR,
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"orientation", orientation,
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"adjustment", adjustment,
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NULL);
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}
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